Method of making flanged cup-shaped metal parts



March 10, 1931. c. SCHMIDT 1,795,379

METHOD OF MAKING FLANGED CUP SHAPED METAL PARTS Filed June 27, 1927 2 Sheets-Sheet l March 10, 1931. c, SCHMlDT 1,795,379

METHOD OF MAKING FLANGED CUP SHAPED METAL PARTS Filed June 27, 1927 2 Sheets-Shae! 2 Patented Mar. 10, 1931 p i 1,795,379

UNITED STATES PATENT OFFICE CARL SCHMIDT, or IBAERL, GERMANY METHOD OF MAKING FLANGED CUP-SHAPED METAL PARTS Application filed June 27, 1927, Serial No. 201,850, and in Germany July 5, 1926.

My invention relates to a method of makthe lip 16 is opened out by rollers 12' which ing flanged cup-shaped metal parts. are similar to the rollers 12 and bend down It is an object of my invention to so perthe lip 16 into the position shown in dotted form the method that the parts are obtained lines in Fig. 7. For finishing the disc 15, 5 without any auxiliaries, such as mandrels, rollers 7, 7 having rounded edges are pro- 5 supporting rollers, etc. vided, and the initial and finishing stages are To this end I form in the blank a circumshown in Figs. 8 and 9. The cup has a flange ferential lip, open out one part of the lip by a and a tapered rim 17 sharp-edged rotary tool, and forge down the \Vhen it is desired to have a double-walled metal of the opened-out part by applying cup the flange of the cup which projects be- 60 not less than two rotary tools to opposite sides yond its bottom is rolled down by means of of the blank and by imparting relative axial round-edged rollers 7 as shown in Figs. 10 motion to the tools and the blank. and 11. The taper of the rim is a function In the drawings accompanying this speciof the rate of velocities and so it is possible flcation a mill in which my novel method may to generate a cup the two walls of which vary be performed, is illustrated diagrammaticalas to taper, as shown in Fig. ll'where the ly by way of example. outer wall 18 is tapered at a steeper angle The generation of the following parts is than the inner one 17.

illustrated: Figs. 12 and 13 illustrate the generation 1. Figs. 1 to 9: simple flanged cups, of a cup which is partly tapered and partly 70 2. Figs. 10 and 11: flanged and doublecylindrical. The blank is a flanged cup as walled cups, shown in Fig. 9. Atthe beginning of the 3. Figs. 12 and 13: flanged cups which are operation, the rollers 7 are at the same level partly tapered and partly cylindrical. as the lower face of the flange 21. By raising. More particularly,- the slide 1 and at the same time moving the 75 Figs. 1 and 2 illustrate two stages of splitshafts 3 inwardly as shown in Fig. 12, the rim ting the edge of a blank for flanged cups, 22 is contracted. By moving them outwards Figs. 3 and 4 are an elevation and a plan again into the position of Fig. 13 an outward view of the blank as rolled, taper 22 is formed upon continued upward Figs. 5 and 6 are corresponding illustramotion of the slide 1. When after forging 1 t-ions of the blank after forging down, the taper 22 the shafts 3, 3 are held stationary Figs. 7, 8 and 9, illustrate various stages a cylinder 23 will be formed on the taper of rolling the blank. when the slide moves further.

Referring now to Figs. 1 and 2, 1 is a slide It will be understood that various shapes adapted to be displaced in suitable guides by and combinations of shapes may be generated any means, not shown, 11 is a circular block by varying the relative motions and velocity which is rotatably carried on the slide 1 by rates of the parts.

means of an arbour, 3, 3 are shafts adapted to I claim:

be rotated in the direction of the arrows 13, 1. The method of making flanged cup- 40 13, and 12, 12 are sharp-edged rollers which shaped metal parts consisting in making a 90 7 are placed on the shafts 3, 3. The slide 1 is blank with a circumferential lip, opening out held stationary and the shafts 3,besides being one part of said lip by a sharp-edged rotary rotated, are moved inwardly. The rollers 12 tool, and forging down the metal of the will then mill a groove 14 in the block 11, and opened-out part by applying not less than finally the block will assume the condition intwo rotary tools to opposite sides of the dicated by 11' in Figs. 3 and 4. This blank, and by imparting relative axial moblock 11 is then forged, pressed or rolled into tion to said tools and said blank.

a flat plate or disc 15 with a peripheral lip 2. The method of making double-walled 16, as shown in Figs. 5 and 6. cup-shaped metal parts consisting in making This disc is then secured in the slide 1 and a blank with a circumferential lip, opening out one part of said lip by a. sharp-edged rotary tool, forging down the metal of the opened-out part by applying not less than two rotary tools to opposite sides of the blank, imparting relative axial motion to said tools and said blank, and forging down the other part of said lip so as to surround said opened-out part.

3. The method of making flanged cupshaped metal parts consisting in grooving a block by gradually moving sharp-edged rotary tools into said block from two sides, for 'ng down said block so as to compress sai groove into-a lip, opening out one part of said lip by a sharp-edged rotary tool, and forging down the metal of the openedout part by applying not less than two rotary tools to opposite sides of the blank, and by imparting relative axial motion to said tools and said blank.

In testimony whereof I afiix my signature.

CARL SCHMIDT. 

